<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
</head>
<body>
	<h1>JQuery</h1>
	<script src="./jquery-1.8.3.min.js"></script>
	<script>
		$(function(){
			$('h1').css('font-size','100px');
		})
	</script>
</body>
</html>